Over the past 17 years, more than 1.4 million new homes have been certified to earn EPA’s Energy Star label. The Energy Star Certified Homes program, together with its thousands of partners, has transformed the construction of new homes by incorporating key efficiency components: more insulation, higher-efficiency HVAC equipment, tighter ducts, reduced infiltration, better windows, and Energy Star-certified lighting and appliances (see “Energy Star Certified Homes Program at a Glance”).